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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-20 10:10:26 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-20 10:10:26 +0400 |
commit | ece8e0b2f9c980e5511fe8db2d68c6f1859b9d83 (patch) | |
tree | 70f1e3363080884965686576d079d24da8863a58 /init | |
parent | 67cb104b4c30bd52292b6a7f526349aab2dd5cbd (diff) | |
parent | a0327ff0eda915be623658babacef706099c11a8 (diff) | |
download | linux-ece8e0b2f9c980e5511fe8db2d68c6f1859b9d83.tar.xz |
Merge branch 'for-3.9-async' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull async changes from Tejun Heo:
"These are followups for the earlier deadlock issue involving async
ending up waiting for itself through block requesting module[1]. The
following changes are made by these commits.
- Instead of requesting default elevator on each request_queue init,
block now requests it once early during boot.
- Kmod triggers warning if invoked from an async worker.
- Async synchronization implementation has been reimplemented. It's
a lot simpler now."
* 'for-3.9-async' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
async: initialise list heads to fix crash
async: replace list of active domains with global list of pending items
async: keep pending tasks on async_domain and remove async_pending
async: use ULLONG_MAX for infinity cookie value
async: bring sanity to the use of words domain and running
async, kmod: warn on synchronous request_module() from async workers
block: don't request module during elevator init
init, block: try to load default elevator module early during boot
Diffstat (limited to 'init')
-rw-r--r-- | init/do_mounts_initrd.c | 3 | ||||
-rw-r--r-- | init/initramfs.c | 8 | ||||
-rw-r--r-- | init/main.c | 16 |
3 files changed, 26 insertions, 1 deletions
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index f9acf71b9810..a32ec1ce882b 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -61,6 +61,9 @@ static void __init handle_initrd(void) sys_mkdir("/old", 0700); sys_chdir("/old"); + /* try loading default modules from initrd */ + load_default_modules(); + /* * In case that a resume from disk is carried out by linuxrc or one of * its children, we need to tell the freezer not to wait for us. diff --git a/init/initramfs.c b/init/initramfs.c index 84c6bf111300..a67ef9dbda9d 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -592,7 +592,7 @@ static int __init populate_rootfs(void) initrd_end - initrd_start); if (!err) { free_initrd(); - return 0; + goto done; } else { clean_rootfs(); unpack_to_rootfs(__initramfs_start, __initramfs_size); @@ -607,6 +607,7 @@ static int __init populate_rootfs(void) sys_close(fd); free_initrd(); } + done: #else printk(KERN_INFO "Unpacking initramfs...\n"); err = unpack_to_rootfs((char *)initrd_start, @@ -615,6 +616,11 @@ static int __init populate_rootfs(void) printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); free_initrd(); #endif + /* + * Try loading default modules from initramfs. This gives + * us a chance to load before device_initcalls. + */ + load_default_modules(); } return 0; } diff --git a/init/main.c b/init/main.c index cee4b5c66d81..63534a141b4e 100644 --- a/init/main.c +++ b/init/main.c @@ -70,6 +70,8 @@ #include <linux/perf_event.h> #include <linux/file.h> #include <linux/ptrace.h> +#include <linux/blkdev.h> +#include <linux/elevator.h> #include <asm/io.h> #include <asm/bugs.h> @@ -794,6 +796,17 @@ static void __init do_pre_smp_initcalls(void) do_one_initcall(*fn); } +/* + * This function requests modules which should be loaded by default and is + * called twice right after initrd is mounted and right before init is + * exec'd. If such modules are on either initrd or rootfs, they will be + * loaded before control is passed to userland. + */ +void __init load_default_modules(void) +{ + load_default_elevator_module(); +} + static int run_init_process(const char *init_filename) { argv_init[0] = init_filename; @@ -900,4 +913,7 @@ static noinline void __init kernel_init_freeable(void) * we're essentially up and running. Get rid of the * initmem segments and start the user-mode stuff.. */ + + /* rootfs is available now, try loading default modules */ + load_default_modules(); } |